Suppressed and enhanced spin polarization in the 1ML-Pb/Ge(1 1 1)-1 x 1 system

Title: Suppressed and enhanced spin polarization in the 1ML-Pb/Ge(1 1 1)-1 x 1 system
Creator: Szary, Maciej J.; Pieczyrak, Barbara; Jurczyszyn, Leszek; Radny, Marian W.
Relation: Applied Surface Science Vol. 466, Issue 1 February 2019, p. 224-229
Publisher Link: http://dx.doi.org/10.1016/j.apsusc.2018.10.028
Publisher: Elsevier
Resource Type: journal article
Date: 2019
Description: It is shown, based on the density functional theory (DFT), that the spin splitting of surface electronic states induced by a Pb monolayer on the Ge(1 1 1)-1 x 1 surface depends on the bonding structure of the Pb/Ge interface and may be either significant, 0.8 eV, (H₃/T₄) or completely suppressed (T₁). It is also shown that for the former the bonding configuration facilitates an emergence of unquenched orbital angular momentum L along -K-M direction, which then lifts the spin degeneracy of the electronic states through the spin-orbit coupling (SOC) of electrons in Pb. Along with the DFT data, we present a complementary analysis conducted withing the orbital Rashba framework, which provides an additional insight into the SOC-induced splitting.
Subject: density functional theory; spin orbit coupling; spin-split surface states; band structure; electronic spin; Rashba effect
Identifier: http://hdl.handle.net/1959.13/1468365
Identifier: uon:48042
Identifier: ISSN:0169-4332
Language: eng
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